After becoming the strongest in the world before she even knew it, Azusa entered into a new lifestyle with her first pupil, Laika the dragon, and discovered fun and enjoyment in it that she hadn't known before. But then, one day, a young girl calling Azusa her "mama" shows up and proclaims that her younger sister wants to kill Azusa. But Azusa has no memory of giving birth to these two girls, or of becoming a mother at all...
My little sister's trying to kill you!
!تحاول أختي الصّغيرة قتلك
Meine kleine Schwester
wird versuchen, dich zu töten!
¡Mi hermana quiere matarte!
¡Mi hermana quiere matarte!
Ma petite sœur cherche à te tuer !
La mia sorellina vuole ucciderti!
A minha irmãzinha
tá vindo pra te matar!
Младшая сестра хочет убить тебя!